package java201521123069;
import java.util.Scanner;
public class Main {

	public static void main(String[] args) {
	
		Scanner in=new Scanner(System.in);
		double a,b;
		while(in.hasNextDouble())
		{
			a=in.nextDouble();
			b=in.nextDouble();
			System.out.println(a+b);
		}
	

	}

}
